cleanup stale longitudinal params (#25967)

selfdrive/controls/controlsd.py

@@ -143,6 +143,11 @@ class Controls:
     put_nonblocking("CarParamsCache", cp_bytes)
     put_nonblocking("CarParamsPersistent", cp_bytes)
 
+    # cleanup old params
+    if not self.CP.experimentalLongitudinalAvailable:
+      params.remove("EndToEndLong")
+      params.remove("ExperimentalLongitudinalEnabled")
+
     self.CC = car.CarControl.new_message()
     self.CS_prev = car.CarState.new_message()
     self.AM = AlertManager()